Bolt for



UNirn STATES PATENT oFFioE;

LINUS YALE, 0F NEWPORT, NEW YORK.

BOLT FOR VAUL'I AND SAFE DOORS.

Specicaton of Letters Patent N o. 15,500, dated August 5, 1856.

To all whom it may concern:

Be it known that I, LINUS YALE, of Newport, in the county of Herkimer and State of New York, have invented a new and Improved Method o-f Bolting the Doors of Safe-Vaults, Sac.; and I do hereby declare the following to be a full and exact description of the same, reference being had to the accompanying drawings.

The nature of my invention consists in providing the front edge of the door with al perpendicular bar containing a suitable number-according to the height of the door-of teeth or hooks, standing at an angle of about forty-five degrees, and projecting or pointing toward the rabbet of the jamb, into suitable holes in which, they are forced on closing the door. The points of the said hooks or teeth rest naturally on a level with the holes which they are de signed' to lill but being formed at an angle of forty-five degrees they, immediately on entering, are crowded upward as well as inward-the bar before mentioned having a sufficient degree of perpendicular movement to accommodate this upward thrust-their eXtreme movement ending` with the complete closing of the door. The lock lbolt being now thrown across the perpendicular bar, or into a notch in it provided for that purpose, prevents its moving downward which it must do in order to relieve the teeth from the hole in the jamb, thereby preventing the opening of the door. But by withdrawing the lock-bolt a slight draft on the door forces the bar downward as well as outward by means of the slant of the teeth above mentioned thereby relieving` their hold upon the jainb and admitting the door to open freely.

To enable others skilled in the art to make and use my invention I will describe its construction andoperatio-n.

The loor A, see drawings and jamb B, are pro ided with an offset or rabbet a and which match and close iiat againsteach other. Across this shoulder-joint in transverse sec. 1, are short angular hooks c c" 0 attached to and part of bolt-bar C, seen in vertical sec. 2. The bolt cl of the lock D, shoots into a notch of the bolt-bar C, and holds it from a downward or end movement, which is absolutely necessary to allow the door to open, as the bei-'ore mentioned hooks cannot be drawn straight out of the holes fe e e in the jamb B, but must have a double motion viz., downward and outward to be freed from their hold ulpon the jamb.

This motion is given by the motion of the door upon its hinges the closing motion raising the bar and the opening or outward motion depressing the same.

Vhat I claim as my invention and desire to secure by Letters Patent is- An arrangement of bolts on bars which are self acting in the manner or an equivalent manner to that described and for the purposes set forth.

LINUS YALE. vWitnesses: A

1V. L. WILSON, GEO H. HUDBRET. 

